Malicious PDF — malware analysis report

Static analysis result for SHA-256 8207eb39e83cc512…

MALICIOUS

PDF

87.1 KB Created: 2021-03-14 18:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75f7128b649c20e3e36e0c31f04dfe22 SHA-1: e27ae591185e1a489e8d3aa7fa27ffec7a2c185b SHA-256: 8207eb39e83cc512f31ae1a4a2fb7e1378a5ce6b4692c43d853fd74c3a093165
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a keyword related to software downloads in the document body and URLs indicates a lure for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the assessment of a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/wix?keyword=snaptube+pro+apk+download+2020
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/4695700.pdf
    • http://temopiju.iblogger.org/wanaz.pdf
    • https://vigiminalaxu.weebly.com/uploads/1/3/1/4/131454394/3525903.pdf
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/zijalomero_bamajogorixeta.pdf
    • https://kakifiku.weebly.com/uploads/1/3/5/3/135347754/7635668.pdf
    • http://gemajelibetojup.scienceontheweb.net/voxavarodevoxav.pdf
    • http://vizexibidoxi.getenjoyment.net/cuentos_de_eva_luna_clarisa_personajes.pdf
    • http://pevazaw.mypressonline.com/kimobitojewozesiv.pdf
    • http://rofuxipof.mywebcommunity.org/7117004710.pdf
    • http://govuled.mywebcommunity.org/how_to_use_microsoft_onenote_ocr.pdf
    • https://kupifima.weebly.com/uploads/1/3/0/7/130775493/8699900.pdf
    • http://bamigewagozajom.iblogger.org/jbl_lsr305_dimensions.pdf
    • http://nuboxipumes.iblogger.org/59953668595.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jibufunipibavu.rf.gd/my_american_dream_song.pdf
    • https://s3.amazonaws.com/jozetej/fixidux.pdf
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_363560bec83e49809b576374ec17e7d7.pdf?index=true
    • https://s3.amazonaws.com/jifesu/23416614.pdf
    • https://s3.amazonaws.com/tawosutosuxi/vuzaxipamifo.pdf
    • http://buxamojajowolos.rf.gd/christmas_carol_lyrics_sheet_music_free.pdf
    • https://s3.amazonaws.com/jivamubug/bible_coloring_sheets_for_toddlers.pdf
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_7919b4ab5e564f4fab02f78fdd0a894a.pdf?index=true
    • http://dafuwinev.myartsonline.com/basic_skills_in_interpreting_laboratory_data_6th_edition.pdf
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_cd31f52f2aea471982f936205436a4a3.pdf?index=true
    • http://zuzopejorexa.onlinewebshop.net/fender_mustang_1_v2_software.pdf
    • http://duvodix.myartsonline.com/86801155719.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f375.bin
6bd6a6146fa2c638bcfae48a29296a9d6ed9b127b83cd3ec280f9b15071b9256
pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 5448 bytes
font_01_sfnt_off00010618.bin
cf6017f068e07405202843dfcc3f432e3c69e3d885ac44901df72cdccd8586da
pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 22636 bytes
font_02_sfnt_off000138b3.bin
1fc45ffb276bc0ed432a2ee8557dc1c00bbf2a452b59535034eda65dd5597ea3
pdf-font-stream PDF embedded font (sfnt) at offset 0x138B3 16320 bytes